ArcGIS styles of the maki icon set

This pull request contains ArcGIS styles with the maki icons.  The styles are supplied in both Desktop (.style) and Server (.serverStyle) formats for use in ArcGIS Desktop, Server, and Engine products.  The style contains the 12/18/24 px the versions of each symbol allowing the user to choose the appropriate size.  A preview of the symbols in the selector in ArcGIS is below:

![makiSelector](https://f.cloud.github.com/assets/1766401/170234/aa2b555c-7a5b-11e2-9db7-a3e1d1855b72.png)